1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.server.autofill.ui;
18 
19 import android.annotation.NonNull;
20 import android.app.AppOpsManager;
21 import android.content.Context;
22 import android.os.Binder;
23 import android.os.IBinder;
24 import android.os.UserHandle;
25 
26 /**
27  * This class controls showing/hiding overlays. We don't
28  * hide all overlays (toast/system alerts) while sensitive
29  * autofill UI is up.
30  */
31 class OverlayControl {
32 
33     private final IBinder mToken = new Binder();
34 
35     private final @NonNull AppOpsManager mAppOpsManager;
36 
OverlayControl(@onNull Context context)37     OverlayControl(@NonNull Context context) {
38         mAppOpsManager = context.getSystemService(AppOpsManager.class);
39     }
40 
hideOverlays()41     void hideOverlays() {
42         setOverlayAllowed(false);
43     }
44 
showOverlays()45     void showOverlays() {
46         setOverlayAllowed(true);
47     }
48 
setOverlayAllowed(boolean allowed)49     private void setOverlayAllowed(boolean allowed) {
50         if (mAppOpsManager != null) {
51             mAppOpsManager.setUserRestrictionForUser(AppOpsManager.OP_SYSTEM_ALERT_WINDOW, !allowed,
52                     mToken, null, UserHandle.USER_ALL);
53             mAppOpsManager.setUserRestrictionForUser(AppOpsManager.OP_TOAST_WINDOW, !allowed,
54                     mToken, null, UserHandle.USER_ALL);
55         }
56     }
57 }
58